The Van't Hoff factor of $Ca(NO_3)_2$ is

Which of the following solutions exhibits the minimum boiling point elevation under identical conditions? (Assume complete dissociation)

$2 \ m$ aqueous solution of an electrolyte $X_3Y_2$ is $25\%$ ionized. The boiling point of the solution is .......... $K.$ ($K_b$ for $H_2O = 0.52 \ K \ kg/mol$)

For a dilute aqueous solution of glucose,the van't Hoff factor $(i)$ is:

The osmotic pressure $(O.P.)$ of equimolar solutions of $Urea$,$BaCl_2$,and $AlCl_3$ will be in the order:

The depression in freezing point of a $NaCl$ solution is $6 \ K$. If $K_f = 1.86 \ K \ kg \ mol^{-1}$ for water,then the amount of $NaCl$ dissolved in $1 \ kg$ of water is ............. $mol$?